Quote Originally Posted by Queen Anthai
Oh, and I forgot - anyone know why Bevelle and Zanarkand went to war?
I don't think that was explained in-game, but I always got the impression that Bevelle was the aggressor since they completely outmatched Zanarkand. The Bahamut Fayth tells Tidus this:

Fayth
"A war between Zanarkand and Bevelle."
"Bevelle's machina assured their victory from the start. Spira had never seen such power."
"The summoners of Zanarkand didn't stand a chance."
"Zanarkand was doomed to oblivion."
"That's why we tried to save it--if only in a memory."

You're welcome, by the way. I was glad to help.